#ifndef _ASM_X86_KVM_PARA_H
#define _ASM_X86_KVM_PARA_H

#include <asm/hyperv.h>
#include <linux/types.h>

/* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx.  It
 * should be used to determine that a VM is running under KVM.
 */
#define KVM_CPUID_SIGNATURE                0x40000000

/* This CPUID returns a feature bitmap in eax.  Before enabling a particular
 * paravirtualization, the appropriate feature bit should be checked.
 */
#define KVM_CPUID_FEATURES                 0x40000001
#define KVM_FEATURE_CLOCKSOURCE            0
#define KVM_FEATURE_NOP_IO_DELAY           1
#define KVM_FEATURE_MMU_OP                 2

/* This indicates that the new set of kvmclock msrs
 * are available. The use of 0x11 and 0x12 is deprecated
 */
#define KVM_FEATURE_CLOCKSOURCE2           3
#define KVM_FEATURE_ASYNC_PF               4
#define KVM_FEATURE_STEAL_TIME             5
#define KVM_FEATURE_PV_EOI                 6

/* The last 8 bits are used to indicate how to interpret the flags field
 * in pvclock structure. If no bits are set, all flags are ignored.
 */
#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 24

#define MSR_KVM_WALL_CLOCK                 0x11
#define MSR_KVM_SYSTEM_TIME                0x12

#define KVM_MSR_ENABLED                    1

/* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
#define MSR_KVM_WALL_CLOCK_NEW             0x4b564d00
#define MSR_KVM_SYSTEM_TIME_NEW            0x4b564d01
#define MSR_KVM_ASYNC_PF_EN                0x4b564d02
#define MSR_KVM_STEAL_TIME                 0x4b564d03
#define MSR_KVM_PV_EOI_EN                  0x4b564d04

struct kvm_steal_time {
  __u64 steal;
  __u32 version;
  __u32 flags;
  __u32 pad[12];
};

#define KVM_STEAL_ALIGNMENT_BITS 5
#define KVM_STEAL_VALID_BITS     ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
#define KVM_STEAL_RESERVED_MASK  (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1) << 1)

#define KVM_MAX_MMU_OP_BATCH     32

#define KVM_ASYNC_PF_ENABLED     (1 << 0)
#define KVM_ASYNC_PF_SEND_ALWAYS (1 << 1)

/* Operations for KVM_HC_MMU_OP */
#define KVM_MMU_OP_WRITE_PTE     1
#define KVM_MMU_OP_FLUSH_TLB     2
#define KVM_MMU_OP_RELEASE_PT    3

/* Payload for KVM_HC_MMU_OP */
struct kvm_mmu_op_header {
  __u32 op;
  __u32 pad;
};

struct kvm_mmu_op_write_pte {
  struct kvm_mmu_op_header header;
  __u64 pte_phys;
  __u64 pte_val;
};

struct kvm_mmu_op_flush_tlb {
  struct kvm_mmu_op_header header;
};

struct kvm_mmu_op_release_pt {
  struct kvm_mmu_op_header header;
  __u64 pt_phys;
};

#define KVM_PV_REASON_PAGE_NOT_PRESENT 1
#define KVM_PV_REASON_PAGE_READY       2

struct kvm_vcpu_pv_apf_data {
  __u32 reason;
  __u8 pad[60];
  __u32 enabled;
};

#define KVM_PV_EOI_BIT      0
#define KVM_PV_EOI_MASK     (0x1 << KVM_PV_EOI_BIT)
#define KVM_PV_EOI_ENABLED  KVM_PV_EOI_MASK
#define KVM_PV_EOI_DISABLED 0x0
#endif /* _ASM_X86_KVM_PARA_H */
